sm64/lib/asm/guTranslate.s
2023-08-17 08:56:02 -04:00

66 lines
1.4 KiB
ArmAsm

.set noat
.set noreorder // don't insert nops after branches
#include "macros.inc"
.section .text, "ax"
#ifdef VERSION_CN
.balign 16
glabel guTranslate
li $at, 0x47800000 // 65536.000000
mtc1 $at, $f4
mtc1 $a1, $f6
mul.s $f8, $f6, $f4
trunc.w.s $f10, $f8
mfc1 $t1, $f10
mtc1 $a2, $f6
mul.s $f8, $f6, $f4
trunc.w.s $f10, $f8
mfc1 $t3, $f10
srl $t2, $t1, 0x10
sll $t0, $t2, 0x10
srl $t2, $t3, 0x10
or $t0, $t0, $t2
sw $t0, 0x18($a0)
sll $t0, $t1, 0x10
sll $t2, $t3, 0x10
srl $t2, $t2, 0x10
or $t0, $t0, $t2
sw $t0, 0x38($a0)
mtc1 $a3, $f6
mul.s $f8, $f6, $f4
trunc.w.s $f10, $f8
mfc1 $t1, $f10
srl $t2, $t1, 0x10
sll $t0, $t2, 0x10
addiu $t0, $t0, 1
sw $t0, 0x1c($a0)
sll $t2, $t1, 0x10
sw $t2, 0x3c($a0)
sw $zero, ($a0)
sw $zero, 4($a0)
sw $zero, 8($a0)
sw $zero, 0xc($a0)
sw $zero, 0x10($a0)
sw $zero, 0x14($a0)
sw $zero, 0x20($a0)
sw $zero, 0x24($a0)
sw $zero, 0x28($a0)
sw $zero, 0x2c($a0)
sw $zero, 0x30($a0)
sw $zero, 0x34($a0)
lui $t0, 1
ori $t0, $t0, 0
sw $t0, ($a0)
sw $t0, 0x14($a0)
lui $t0, (0x00000001 >> 16) # lui $t0, 0
ori $t0, (0x00000001 & 0xFFFF) # ori $t0, $t0, 1
jr $ra
sw $t0, 8($a0)
#endif